Merge pull request #36 from fartem/3340-Check-Balanced-String

2025-05-06 v. 1.0.7: added "3340. Check Balanced String"

Author: fartem

README.md

@@ -41,5 +41,6 @@ Profile on LeetCode: [fartem](https://leetcode.com/fartem/).
 | 263. Ugly Number                                | [Link](https://lettcode.com/problems/ugly-number/)                                | [Link](./lib/easy/263_ugly_number.dart)                                |
 | 500. Keyboard Row                               | [Link](https://leetcode.com/problems/keyboard-row/)                               | [Link](./lib/easy/500_keyboard_row.dart)                               |
 | 3280. Convert Date to Binary                    | [Link](https://leetcode.com/problems/convert-date-to-binary/)                     | [Link](./lib/easy/3280_convert_date_to_binary.dart)                    |
+| 3340. Check Balanced String                     | [Link](https://leetcode.com/problems/check-balanced-string/)                      | [Link](./lib/easy/3340_check_balanced_string.dart)                     |
 | 3516. Find Closest Person                       | [Link](https://leetcode.com/problems/find-closest-person/)                        | [Link](./lib/easy/3516_find_closest_person.dart)                       |
 | 3536. Maximum Product of Two Digits             | [Link](https://leetcode.com/problems/maximum-product-of-two-digits/)              | [Link](./lib/easy/3536_maximum_product_of_two_digits.dart)             |

lib/easy/3340_check_balanced_string.dart

@@ -0,0 +1,18 @@
+class Solution {
+  bool isBalanced(String num) {
+    var even = 0;
+    var odd = 0;
+
+    for (var i = 0; i < num.length; i += 1) {
+      final curr = int.parse(num[i]);
+
+      if (i.isEven) {
+        even += curr;
+      } else {
+        odd += curr;
+      }
+    }
+
+    return even == odd;
+  }
+}

pubspec.yaml

@@ -1,6 +1,6 @@
 name: leetcode_dart
 description: Some solved problems from https://leetcode.com on Dart
-version: 1.0.6
+version: 1.0.7
 homepage: https://github.com/fartem/leetcode-dart
 
 environment:

test/easy/3340_check_balanced_string_test.dart

@@ -0,0 +1,30 @@
+import 'package:leetcode_dart/easy/3340_check_balanced_string.dart';
+import 'package:test/test.dart';
+
+void main() {
+  group(
+    'Example tests',
+    () {
+      final solution = Solution();
+
+      test(
+        'false',
+        () => expect(
+          false,
+          solution.isBalanced(
+            '1234',
+          ),
+        ),
+      );
+      test(
+        'true',
+        () => expect(
+          true,
+          solution.isBalanced(
+            '24123',
+          ),
+        ),
+      );
+    },
+  );
+}